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SAA AS 4747.6

2013 Edition, February 21, 2013

Complete Document

METERS FOR NON-URBAN WATER SUPPLY PART 6: INSTALLATION AND COMMISSIONING OF OPEN CHANNEL METERS



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Description / Abstract:

This Standard sets out requirements for the installation and commissioning of meters complying with NMI M11-1 and AS 4747.3, for use in non-urban applications in open channel and part-filled pipe applications. The Standard principally covers metering for irrigation water.

Two types of meter installations are covered in this Standard, as follows:

(a) A ‘self-contained unit'—a meter that defines its own geometry, is able to be patternapproved as a complete water meter, calibrated upon assembly and supplied by a single supplier.

(b) A ‘modular metering system'—a device or group of instruments (which may be supplied as a pattern-approved metering system) that does not define the installation geometry and requires configuration after installation.

NOTES:

1 The requirements for these types of meters to demonstrate compliance with this Standard, and hence with the National Framework are set out and illustrated in Section 7 of AS 4747.3.

2 Meters with undefined or variable channel are not covered by this Standard.

In this Standard, a meter installation is considered to include—

(i) the meter, its indicating device and all ancillary equipment; and

(ii) the upstream and downstream pipe or emplacement that may have a material effect on the meter unit.

The Standard covers meters that operate under the following conditions:

(A) Open channels.

(B) Working water temperature range of 0.1°C to 30°C. The maximum admissible temperature is 50°C, which is the limiting condition for the meter.

(C) Ambient temperature range of −5°C to 55°C.

(D) Ambient humidity range of 0% to 100% except for remote indicating devices where the range is 0% to 93%.